We alleviate both problems by replacing the \(\min \)  operation by a soft-min operation, \(\min _\gamma \) , similarly to [1]}. The soft-min operation \(\min _\gamma \)  is defined as
\(\min \nolimits _\gamma (a_1,\ldots , a_n) = -\gamma \log \sum _{i=1}^n \exp \left(-\frac{a_i}{\gamma }\right).\) 
